If the scalar triple product of 3 vectors →a,→b and →cis 0 , then they are coplanar.
True
Look, when the volume of the parallelopipped spanned by →a,→b and →c is zero, that means it’s a flat parallelopipped with no height. It clearly means that when it’s a flat one, then all the vectors are in one plane i.e., they are coplanar.